Intermittent grip device.



NQ. 717,704. PATENTED JAN. 6, 1903.

P. A. MOGARVILLE.

INTERMITTENT GRIP DEVISE.

APPLIOATION PILE) MAR. 21, 1902 N0 MODEL.

Flax

by l

lgaglor;

fue wams PEI-:ns tn. womuruq., wAsHwuYoN, u c.

UNITED v STATES PATENT OEEICE.

PETER AGUSTINOMCCARVILLE, OF CLARE, IOWA.

INTERNHTTENT GRIP DEVICE.

SPECIFICATION forming part ofl Letters Patent N o. 717,704, dated January 6, 1903.

Application' nea nach 2i, 1902. sain No. 99,365.v (No man.)

To aZZ whom; t may concern:

Be it known that I, PETER AGUSTIN MCCAE- VILLE, a citizen of the United States, residing at Clare, in the county of Webster and State of Iowa, have invented a new and useful Intermittent Grip Device, of which the following is a specification.

This invention relates to an intermittent grip device for the transmission of power, and has for its object more particularlythe production of a simple, cheap, and efficient means for utilizing a portion of the power of windmills and similar machinery to operate lighter machinery in addition to the machinery operated directly by the windmill or other source of power.

The invention further consists in certain novel features of the construction, all as hereinafter shown and described, and specifically pointed out in the claim.

The invention may be employed in connection with any source of power wherein a reciprocating beam or rod is employed, such as the operative rods of windmills, to which it is more particularly applicable, and for the purpose of illustration I have shown it in the drawings thus applied.

Figure 1 Irepresents a side elevation, foreshortened and partially in section, of a portion of a pump and a portion ofl the operating-rod of a windmill with the improved apparatus connected therewith. Fig. 2 is a front view of the same.

The pump being driven is represented at l and the windmill driving-rod at 11, of the ordinary construction.

The improved apparatus which is the subject of this invention consists of an endless belt, preferably in the form of a 'chain l2, disposed to operate over two sprocket-wheels 13 14, mounted on vertically-alined shafts 15 16, supported in a suitable framework 17, as shown. The wheel 13 will preferably be smaller than the wheel 14, the purpose to be hereinafter described. The machinery to be driven will be connected to one of the shafts 15 or 16, and for the purpose of illustration a gear-wheelis shown at 18 to indicatethe fact that the shaft 16 will be employed to transmit the power. The device will generally be employed to run any light machinery-such as grindstones, churns, corn-shellers, and the like-but may be employed to run any desired kind of machinery within its capacity.

Connected to the bar 11 at any convenient point are two pawl-bars 19 20, preferably coupled together by a bracket 21, the latter having a vertical rod 22, passing through a hanger 23, attached, as by a bracket 24, to the rod 1l, as shown. The rod 22 will be surrounded by two coiled springs, one above and one below a transverse plate 27 in the hanger 23, so that the pawl-bars 19 and 2O will be yieldable during both their upward and downward movements, as hereinafter shown.

Upon the lower end of the pawl-bar 19 is a hook or pawl 2S, pointing upward and adapted to engage the chain 12 on one side when moving upward, and the pawl-bar 2O will be likewise provided with alhook or pawl 29, pointing downward and adapted to engage the other side of the chain when moving downward. The pawl 28 will thus engage the chain when moving upward and pass over the links without engaging them when moving downward, while the pawl 29 will engage the chain when moving downward and pass over the links without engaging them when moving upward. As before stated, the upper sprocket-wheel 13 is smaller than the lower wheel 14E, so that the two straight portions of the chain incline slightly inward, the object of this being'to prevent the pawl-bars 19 and from coming in contact with the chain during their :movement By this arrangement when the pump-rod 11 or other reciprocating source of power is reciprocated vertically the pawl-bars 19 and 2G will reciprocate with it and constantly revolve the chain both during the upward and downward stroke, as will be readily understood. By this simple means the reciprocatory movement of the rod 1l is transmittedto the shaft 16 and thence to the machinery which it is designed to operate.

The springs and 26 perform an important function, as they provide ya yieldable joint or coupling between thegrod ll'and the levers 19 and 20, so that all sudden jars or shocks are absorbed and the strains thereby greatly lessened, while at the same time eliminating the noise or rattling to a large extent. The parts may be constructed of any size or of any quality of material to adapt them to the work required of them and to adapt the apparatus to the' machinery to be operated and may also be modified and changed in minor particulars Without departing from the spirit or scope of the invention.

Having thus fullydescribed my invention, what I claim as new, and desire to secure by Letters Patent, is

In a device of the class specified, the combination with a pair of sprocket-Wheels of different diameter, of a link belt passing over said sprocket-Wheels, a reciprocating rod, a bracket carried thereby, a spring-support carried by said bracket and having a guidingopening, a rod adapted to said guiding-opening, springs encircling said rod on either side 

